hello, do you want to ask what is the qualification standard of the 3m crawler card? 3M Crawler Card is a kind of testing equipment for testing cleaning performance, which is usually used to test surface cleanliness and surface treatment effect. The following are the eligibility criteria for the 3M crawler card:

1. Appearance: The 3M crawler card should be free from damage, deformation, signs or traces, such as coating spots and foreign objects. If the above defects are found, they should be scrapped or replaced immediately.

2. dimensions and specifications: the 3M crawler card shall meet the dimensions and specifications provided by the manufacturer, such as width, length and thickness. When using, it should follow the recommended operation mode provided by the manufacturer.

3. Surface quality: The surface of the 3M crawler card should be clean, flat, smooth, free of particles and flash. If the above defects appear on the surface, the accuracy of the test results will be affected.

4. Viscosity: The viscosity of the 3M crawler card should meet the specifications provided by the manufacturer to ensure that the test results can accurately reflect the cleanliness of the surface of the tested object. In a word, when testing with the 3M crawler card, it is necessary to strictly follow the instructions and standards provided by the manufacturer to ensure the accuracy and reliability of the test results.